Properties of flotation tailing from one coal preparation plant analyzed;experiments taken on fine-grinding of coarse slime from such tailing and its separation by flocculation-flotation,giving a concentrate with ash content of 8.

,at first,separation of the slime by conventional flotation to give a relatively low ash concentrate,a tailing containing an ash as high as possible,and a middling to be ultra-fined ground to liberate extensively the inorganic minerals embedded in coal matrix,followed by its separation,in the seamed,by flocculation-flotation to recover additional low ash concentrate.

01% yield was achieved by flocculation-flotation of coarse fraction of > 60 mesh in flotation tailing after ultra-fine grinding and a coal-water slurry of 74% concentration and 80 mPa·s visco.

Study on the effects of anion on drilling wastewater treatment by electrocoagulation-flotation process;